I think the answer is Plushenko.
Because the jumps never fail him.
Seriously, how many times in his career did he ever fall in competition? You could probably count them on two hands and have fingers left over. Even at the end when he started deteriorating he still stayed on his feet, still rotated his jumps. There was never a doubt about rotation. The only question over technique was a ! flip but he's hardly the first man to have one, or last one.
His quad toe has remained stable and solid right through to the end, and everything else was also reliable. And for that reason I think he is the best.
He had solid 3A and 4T, but 4T was his only reliable competition quad. What about other things like steps and spins ?
I am not going to talk about stuff like transitions because Plush never had them